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u-boot/board/gateworks/gw_ventana/gsc.c
Tom Rini 83d290c56f SPDX: Convert all of our single license tags to Linux Kernel style 
When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-07 09:34:12 -04:00

274 lines
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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2013 Gateworks Corporation
*
* Author: Tim Harvey <tharvey@gateworks.com>
*/
#include <linux/errno.h>
#include <common.h>
#include <i2c.h>
#include <linux/ctype.h>
#include "ventana_eeprom.h"
#include "gsc.h"
/*
* The Gateworks System Controller will fail to ACK a master transaction if
* it is busy, which can occur during its 1HZ timer tick while reading ADC's.
* When this does occur, it will never be busy long enough to fail more than
* 2 back-to-back transfers. Thus we wrap i2c_read and i2c_write with
* 3 retries.
*/
int gsc_i2c_read(uchar chip, uint addr, int alen, uchar *buf, int len)
{
int retry = 3;
int n = 0;
int ret;
while (n++ < retry) {
ret = i2c_read(chip, addr, alen, buf, len);
if (!ret)
break;
debug("%s: 0x%02x 0x%02x retry%d: %d\n", __func__, chip, addr,
n, ret);
if (ret != -ENODEV)
break;
mdelay(10);
}
return ret;
}
int gsc_i2c_write(uchar chip, uint addr, int alen, uchar *buf, int len)
{
int retry = 3;
int n = 0;
int ret;
while (n++ < retry) {
ret = i2c_write(chip, addr, alen, buf, len);
if (!ret)
break;
debug("%s: 0x%02x 0x%02x retry%d: %d\n", __func__, chip, addr,
n, ret);
if (ret != -ENODEV)
break;
mdelay(10);
}
mdelay(100);
return ret;
}
static void read_hwmon(const char *name, uint reg, uint size)
{
unsigned char buf[3];
uint ui;
printf("%-8s:", name);
memset(buf, 0, sizeof(buf));
if (gsc_i2c_read(GSC_HWMON_ADDR, reg, 1, buf, size)) {
puts("fRD\n");
} else {
ui = buf[0] | (buf[1]<<8) | (buf[2]<<16);
if (reg == GSC_HWMON_TEMP && ui > 0x8000)
ui -= 0xffff;
if (ui == 0xffffff)
puts("invalid\n");
else
printf("%d\n", ui);
}
}
int gsc_info(int verbose)
{
unsigned char buf[16];
i2c_set_bus_num(0);
if (gsc_i2c_read(GSC_SC_ADDR, 0, 1, buf, 16))
return CMD_RET_FAILURE;
printf("GSC: v%d", buf[GSC_SC_FWVER]);
printf(" 0x%04x", buf[GSC_SC_FWCRC] | buf[GSC_SC_FWCRC+1]<<8);
printf(" WDT:%sabled", (buf[GSC_SC_CTRL1] & (1<<GSC_SC_CTRL1_WDEN))
? "en" : "dis");
if (buf[GSC_SC_STATUS] & (1 << GSC_SC_IRQ_WATCHDOG)) {
buf[GSC_SC_STATUS] &= ~(1 << GSC_SC_IRQ_WATCHDOG);
puts(" WDT_RESET");
gsc_i2c_write(GSC_SC_ADDR, GSC_SC_STATUS, 1,
&buf[GSC_SC_STATUS], 1);
}
if (!gsc_i2c_read(GSC_HWMON_ADDR, GSC_HWMON_TEMP, 1, buf, 2)) {
int ui = buf[0] | buf[1]<<8;
if (ui > 0x8000)
ui -= 0xffff;
printf(" board temp at %dC", ui / 10);
}
puts("\n");
if (!verbose)
return CMD_RET_SUCCESS;
read_hwmon("Temp", GSC_HWMON_TEMP, 2);
read_hwmon("VIN", GSC_HWMON_VIN, 3);
read_hwmon("VBATT", GSC_HWMON_VBATT, 3);
read_hwmon("VDD_3P3", GSC_HWMON_VDD_3P3, 3);
read_hwmon("VDD_ARM", GSC_HWMON_VDD_CORE, 3);
read_hwmon("VDD_SOC", GSC_HWMON_VDD_SOC, 3);
read_hwmon("VDD_HIGH", GSC_HWMON_VDD_HIGH, 3);
read_hwmon("VDD_DDR", GSC_HWMON_VDD_DDR, 3);
read_hwmon("VDD_5P0", GSC_HWMON_VDD_5P0, 3);
if (strncasecmp((const char*) ventana_info.model, "GW553", 5))
read_hwmon("VDD_2P5", GSC_HWMON_VDD_2P5, 3);
read_hwmon("VDD_1P8", GSC_HWMON_VDD_1P8, 3);
read_hwmon("VDD_IO2", GSC_HWMON_VDD_IO2, 3);
switch (ventana_info.model[3]) {
case '1': /* GW51xx */
read_hwmon("VDD_IO3", GSC_HWMON_VDD_IO4, 3); /* -C rev */
break;
case '2': /* GW52xx */
break;
case '3': /* GW53xx */
read_hwmon("VDD_IO4", GSC_HWMON_VDD_IO4, 3); /* -C rev */
read_hwmon("VDD_GPS", GSC_HWMON_VDD_IO3, 3);
break;
case '4': /* GW54xx */
read_hwmon("VDD_IO3", GSC_HWMON_VDD_IO4, 3); /* -C rev */
read_hwmon("VDD_GPS", GSC_HWMON_VDD_IO3, 3);
break;
case '5': /* GW55xx */
break;
case '6': /* GW560x */
read_hwmon("VDD_IO4", GSC_HWMON_VDD_IO4, 3);
read_hwmon("VDD_GPS", GSC_HWMON_VDD_IO3, 3);
break;
}
return 0;
}
/*
* The Gateworks System Controller implements a boot
* watchdog (always enabled) as a workaround for IMX6 boot related
* errata such as:
* ERR005768 - no fix scheduled
* ERR006282 - fixed in silicon r1.2
* ERR007117 - fixed in silicon r1.3
* ERR007220 - fixed in silicon r1.3
* ERR007926 - no fix scheduled
* see http://cache.freescale.com/files/32bit/doc/errata/IMX6DQCE.pdf
*
* Disable the boot watchdog
*/
int gsc_boot_wd_disable(void)
{
u8 reg;
i2c_set_bus_num(CONFIG_I2C_GSC);
if (!gsc_i2c_read(GSC_SC_ADDR, GSC_SC_CTRL1, 1, &reg, 1)) {
reg |= (1 << GSC_SC_CTRL1_WDDIS);
if (!gsc_i2c_write(GSC_SC_ADDR, GSC_SC_CTRL1, 1, &reg, 1))
return 0;
}
puts("Error: could not disable GSC Watchdog\n");
return 1;
}
#if defined(CONFIG_CMD_GSC) && !defined(CONFIG_SPL_BUILD)
static int do_gsc_sleep(cmd_tbl_t *cmdtp, int flag, int argc,
char * const argv[])
{
unsigned char reg;
unsigned long secs = 0;
if (argc < 2)
return CMD_RET_USAGE;
secs = simple_strtoul(argv[1], NULL, 10);
printf("GSC Sleeping for %ld seconds\n", secs);
i2c_set_bus_num(0);
reg = (secs >> 24) & 0xff;
if (gsc_i2c_write(GSC_SC_ADDR, 9, 1, &reg, 1))
goto error;
reg = (secs >> 16) & 0xff;
if (gsc_i2c_write(GSC_SC_ADDR, 8, 1, &reg, 1))
goto error;
reg = (secs >> 8) & 0xff;
if (gsc_i2c_write(GSC_SC_ADDR, 7, 1, &reg, 1))
goto error;
reg = secs & 0xff;
if (gsc_i2c_write(GSC_SC_ADDR, 6, 1, &reg, 1))
goto error;
if (gsc_i2c_read(GSC_SC_ADDR, GSC_SC_CTRL1, 1, &reg, 1))
goto error;
reg |= (1 << 2);
if (gsc_i2c_write(GSC_SC_ADDR, GSC_SC_CTRL1, 1, &reg, 1))
goto error;
reg &= ~(1 << 2);
reg |= 0x3;
if (gsc_i2c_write(GSC_SC_ADDR, GSC_SC_CTRL1, 1, &reg, 1))
goto error;
return CMD_RET_SUCCESS;
error:
printf("i2c error\n");
return CMD_RET_FAILURE;
}
static int do_gsc_wd(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
unsigned char reg;
if (argc < 2)
return CMD_RET_USAGE;
if (strcasecmp(argv[1], "enable") == 0) {
int timeout = 0;
if (argc > 2)
timeout = simple_strtoul(argv[2], NULL, 10);
i2c_set_bus_num(0);
if (gsc_i2c_read(GSC_SC_ADDR, GSC_SC_CTRL1, 1, &reg, 1))
return CMD_RET_FAILURE;
reg &= ~((1 << GSC_SC_CTRL1_WDEN) | (1 << GSC_SC_CTRL1_WDTIME));
if (timeout == 60)
reg |= (1 << GSC_SC_CTRL1_WDTIME);
else
timeout = 30;
reg |= (1 << GSC_SC_CTRL1_WDEN);
if (gsc_i2c_write(GSC_SC_ADDR, GSC_SC_CTRL1, 1, &reg, 1))
return CMD_RET_FAILURE;
printf("GSC Watchdog enabled with timeout=%d seconds\n",
timeout);
} else if (strcasecmp(argv[1], "disable") == 0) {
i2c_set_bus_num(0);
if (gsc_i2c_read(GSC_SC_ADDR, GSC_SC_CTRL1, 1, &reg, 1))
return CMD_RET_FAILURE;
reg &= ~((1 << GSC_SC_CTRL1_WDEN) | (1 << GSC_SC_CTRL1_WDTIME));
if (gsc_i2c_write(GSC_SC_ADDR, GSC_SC_CTRL1, 1, &reg, 1))
return CMD_RET_FAILURE;
printf("GSC Watchdog disabled\n");
} else {
return CMD_RET_USAGE;
}
return CMD_RET_SUCCESS;
}
static int do_gsc(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
if (argc < 2)
return gsc_info(1);
if (strcasecmp(argv[1], "wd") == 0)
return do_gsc_wd(cmdtp, flag, --argc, ++argv);
else if (strcasecmp(argv[1], "sleep") == 0)
return do_gsc_sleep(cmdtp, flag, --argc, ++argv);
return CMD_RET_USAGE;
}
U_BOOT_CMD(
gsc, 4, 1, do_gsc, "GSC configuration",
"[wd enable [30|60]]|[wd disable]|[sleep <secs>]\n"
);
#endif /* CONFIG_CMD_GSC */
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